role of each water purifier filter

The filter element of the water purifier depends on the purpose of filtering the water, and the type of filter element used is also different:

Activated carbon filter

There are two categories of activated carbon filter products:

Compressed activated carbon filter element, bulk activated carbon filter element.

1. The compressed activated carbon filter element uses coal-based activated carbon and coconut shell activated carbon with high adsorption value as the filter material, and is sintered and compressed with a food-grade binder. The inside and outside of the compressed activated carbon filter element are respectively wrapped with a layer of non-woven fabric with filtering effect to ensure that the carbon core itself will not drop the carbon powder. The two ends of the carbon core are equipped with soft nitrile rubber gaskets to make the carbon core into the filter cartridge Has good airtightness.

2. Bulk activated carbon filter element. Put the required activated carbon particles into a special plastic shell, use welding equipment to weld the end caps to the two ends of the shell, and put the two ends of the shell into the non-woven fabric for filtering. The filter ensures that the carbon core will not drop carbon powder and black water during use. According to customer needs, the shell end cover can be made into different types of connection ports. Interface methods are: flat pressure type and pipeline type.

PP filter

PP filter element is also called PP melt-blown filter element. The melt-blown filter element is made of polypropylene ultrafine fibers by thermal fusion. The fibers randomly form a three-dimensional microporous structure in space. The pore size is distributed in a gradient along the flow direction of the filtrate, integrating surface and deep layers. , Fine and fine filtration in one, can intercept impurities of different particle sizes. The accuracy range of the filter element is 0.5-100μm, and its flux is more than 1.5 times that of the peak room filter element of the same accuracy. Different types of end cap connectors can be configured to meet the needs of various engineering installations.

Ceramic filter

The ceramic filter element is a new type of environmentally friendly filter element, which uses diatomaceous earth mud as the raw material and is prepared by a special technical molding method. Its average pore size is only 0.1μm, which is currently the filter element with the highest filtration accuracy. Today, Pureeasy and Katadyn of Switzerland mainly adopt this water purifier filter element technology

Ceramic filter

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The ceramic filter element is used to remove the chemical liquid, plating solution, and solid particles in the tap water, while the carbon filter element removes organic impurities in the liquid. When filtering, the solution is pushed by the pump to flow through the filter cartridge and the filter element. The particles are removed in the filter element. The filtered solution passes through the core tube and returns to the electroplating tank or solution tank. It is true that filter paper can also filter out particles, but the effect is different from the filter element. The filter paper separates particles on the surface, while the filter residue of the filter element is hidden between the yarns, and its surface area is much larger than that of filter paper.

Resin filter element

Resin is a porous, insoluble exchange material. There are millions of fine resin balls (beads) in the resin filter element of the water softener, all of which contain many negative charge exchange positions that absorb positive ions. When the resin is in a nascent state? These charge exchange sites are occupied by positively charged sodium ions. When calcium and magnesium pass through the resin storage tank, they come into contact with the resin beads and replace the sodium ions from the exchange position. The resin preferentially binds the stronger charged cations, and the charge of calcium and magnesium ions is stronger than that of sodium ions. Replace the sodium cations and then pass down the resin 'bed, out of the water softener, so that the water softener sends out 'soft' water. Finally, all the resin exchange positions are occupied by calcium and magnesium, and can no longer work.

It is commonly used as a water softener filter element, which can pass through a resin regeneration agent (soft water salt) after filtration. Commonly used are time regeneration and flow regeneration; at present, the most advanced in the world is the German water softener, which adopts time/flow dual program control technology to effectively reduce the consumption of water and resin regeneration agent, and is environmentally friendly and energy-saving.

Titanium rod filter

The titanium rod filter element has excellent properties such as corrosion resistance, high temperature resistance, high strength, easy filtration accuracy, and easy regeneration; the titanium filter element is formed by forming titanium powder and sintering at high temperature, so the surface particles are not easy to fall off; the use temperature in the air It can reach 500～600℃; it is suitable for filtration of various corrosive media, such as: filtration of hydrochloric acid, sulfuric acid, hydroxide, sea water, aqua regia, and chloride solutions such as iron, copper, and sodium.

Increasing the degree of water activation is more conducive to the human body's absorption of water, protecting human health, and promoting human metabolism. KDF filter element is made of this material. This filter element is the best configuration for water purifiers.

Nanofiltration

Nanofiltration membrane is a functional semi-permeable membrane that allows solvent molecules or some low molecular weight solutes or low-valent ions to pass through. It is a special and promising variety of separation membrane. It is named after the size of the material that can be retained is about nanometers. The molecular weight of organic matter is about 150-500, and the ability to intercept soluble salts is 2－ Between 98%, the desalination of monovalent anion salt solutions is lower than that of higher anion salt solutions. It is used to remove the organic matter and color of surface water, remove the hardness of groundwater, partially remove soluble salt, concentrate fruit juice and separate useful substances in medicines.

Empty fiber ultrafiltration membrane

Hollow fiber ultrafiltration membrane is a kind of ultrafiltration membrane. It is the most mature and advanced technology in ultrafiltration technology. Hollow fiber outer diameter: 0.5-2.0mm, inner diameter: 0.3-1.4mm, the wall of the hollow fiber tube is full of micropores, and the pore size is expressed by the molecular weight of the material that can be retained, and the molecular weight cutoff can reach several thousand to several hundred thousand. The raw water flows under pressure on the outside of the hollow fiber or in the inner cavity to form an external pressure type and an internal pressure type respectively. Ultrafiltration is a dynamic filtration process. The retained substances can be removed with concentration without clogging the membrane surface and can be operated continuously for a long time. Ultrafiltration membrane is one of the first polymer separation membranes developed.

RO reverse osmosis membrane

RO reverse osmosis membrane, RO is the abbreviation of English Reverse Osmosis membrane, the Chinese means: reverse osmosis (reverse osmosis), the general flow of water is from low concentration to high concentration, once the water is pressurized, it will flow from high concentration to low concentration , The so-called reverse osmosis principle: Because the pore size of the RO membrane is five millionths (0.0001 micron) of the hair, it is generally invisible to the naked eye. Bacteria and viruses are 5000 times that of it. Therefore, only water molecules and some Mineral ions that are beneficial to the human body can pass through, and other impurities and heavy metals are discharged from the waste water pipe. All seawater desalination processes and astronaut waste water recycling treatment use this method. Therefore, RO membrane is also called external high-tech artificial kidney.

Water purifier filter element replacement cycle

With the rise and popularity of the water purifier (water purifier) ??market, water purifiers (water purifiers) have gradually become a must-use appliance for thousands of households. Consumers have such doubts that water purifier filters are consumables. How often does the filter element of a household water purifier be replaced'. Nowadays, the water purifier industry is in a period of rapid growth. There are many brands of water purifiers on the market, and the varieties of water purifiers are also dazzling. The filtration process and structure of different water purifiers are different, but in general, most commonly used water purifiers are nowadays. The filter element of the water purifier is divided into the following types, and how often the filter element of the water purifier is replaced, summarized as follows: The name of the filter element of the water purifier (water purifier)

1. Hollow fiber ultrafiltration membrane (UF) filter element for 3 years or more

2. Reverse osmosis membrane (RO) filter element for about 3 years

3. Granular fine washed coconut shell activated carbon filter element for half a year to one year

4. Block sintered activated carbon (CTO) filter element for half a year to one year

5. PP cotton filter element 3-6 months

6. KDF filter element 2-3 years

7. Medical stone (tourmaline) filter element for half a year to a year

8. Ceramic filter element for half a year to one year

9. Far infrared mineralized ball filter element is about one year

10. Rear activated carbon (small T33, large T33) filter element for about one year

11. Anion energy ball filter element for half a year to a year

12. Soften the filter element for about half a year

13. Magnetized filter element for half a year to one year

14. Silicon phosphorous fine filter element 2-3 years

15. Quartz sand filter element 1-2

16. Manganese sand filter (FF) six months to one year

In short, different water purification technologies and filter elements have different functional characteristics and service life. Water purifier (water purifier) ??filter elements are consumables and have a certain service life. The actual service life depends on the local water quality and use. Frequent flushing is helpful to extend the service life of the filter element of the water purifier.